OpenTwo archives, queried live.
Every record below comes from The Met or Smithsonian Open Access and was filtered on that archive’s own rights field before it reached this page. 24 shown for “Joseph Friedrich Leopold” — 64 records examined, 10 dropped by the rights gate.
Archives queried 2026-09-06 07:53 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
Ein neues Buch von allerhand Gold-Arbeit, auff unterschiedliche Art und Manier sehr wol u. nüzlich zu gebrauchen
Joseph Friedrich Leopold · 1716
Joseph Cross
Leopold Grozelier, 1830 - 1865 · 1855
The Public Viewing David's "Coronation" at the Louvre
Louis Léopold Boilly · 1810
Joseph Gales
Leopold Grozelier, 1830 - 1865 · 1854
Series of Six Anamorphic Animal Prints
Joseph Friedrich Leopold · ca. 1700
Joseph Gales
Leopold Grozelier, 1830 - 1865 · 1854
Two Men Contemplating the Moon
Caspar David Friedrich · ca. 1825–30
Henry Joseph Gardner
Leopold Grozelier, 1830 - 1865 · 1854
Heroic Landscape with Rainbow
Joseph Anton Koch · 1824
Receipt for postage paid
Artist not stated in the record · November 5, 1813
Pair of Wheellock Rifles Made for Emperor Leopold I (1640–1705)
Caspar Neireiter · ca. 1670–80
Design with Two Figures in a Garden
François de Cuvilliés the younger, German, 1731 - 1777 · 18th century
Benjamin Franklin (1706–1790)
Joseph Siffred Duplessis · 1778
Leopold Stokowski
Ralph Barton, 14 Aug 1891 - 19 May 1931 · 1931
The Banishment of Hagar
Johann Friedrich Overbeck · 1839–41
Leopold Damrosch
Frederich Graetz, c. 1840 - c. 1913 · 1885
Triptych with Scenes from the Passion of Christ
Master Pertoldus · 1494
Skippet and cover with seal of Leopold II
Artist not stated in the record · 1790–92
Longcase clock with calendar
Joseph Knibb · ca. 1680–85
Leopold Kahn
Artist not stated in the record · c. 1860-70
Holy Family
Niclaus Weckmann · ca. 1500
Leopold Kahn
Artist not stated in the record · c. 1860-70
Venice, from the Porch of Madonna della Salute
Joseph Mallord William Turner · ca. 1835
Leopold Kahn
Artist not stated in the record · c. 1860-70
Where these records came from.
Two archives are wired, and only two. Each one is filtered on its own rights field — never on a title match, and never on the presence of an image file.
- The Met Collection API (Open Access)Rights field:
isPublicDomain. 637 matched · 24 examined · 2 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.12 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 91193 matched · 40 examined · 8 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.12 shown
These figures describe the pass run at 2026-09-06 07:53 UTC, during this request. A completed pass is kept for 24 hours and replayed for an identical search, which is what keeps repeated queries inside Smithsonian’s 30-requests-per-hour allowance. A pass in which either archive failed to answer is never kept — an outage must not be replayed as though it were a finding about the catalogue.
Wikimedia Commons and the Library of Congress are deliberately not wired. Wikimedia was confirmed, on a live query, to return CC-BY material inside the same result set as genuine public domain works, and filtering it safely has not been designed yet. loc.gov was blocked by bot detection during the source evaluation, so its rights vocabulary has never been observed — and nothing here is built on a field nobody has read.
An image file is a rights claim. It never travels without its field.